Fix model registration with a model card

Author: bobbywlindsey

sagemaker-core/src/sagemaker/core/model_registry.py

@@ -100,12 +100,9 @@ def get_model_package_args(
     if model_life_cycle is not None:
         model_package_args["model_life_cycle"] = model_life_cycle._to_request_dict()
     if model_card is not None:
-        original_req = model_card._create_request_args()
-        if original_req.get("ModelCardName") is not None:
-            del original_req["ModelCardName"]
-        if original_req.get("Content") is not None:
-            original_req["ModelCardContent"] = original_req["Content"]
-            del original_req["Content"]
+        original_req = {}
+        original_req["ModelCardContent"] = model_card.content
+        original_req["ModelCardStatus"] = model_card.model_card_status
         model_package_args["model_card"] = original_req
     return model_package_args